How a battery earns in Switzerland

Switzerland runs as a single bidding zone under federal TSO Swissgrid — synchronously coupled to Continental Europe yet outside the EU internal market, so day-ahead coupling with the CORE and Italy North regions rests on private-law contracts. The grid is already 95% low-carbon, dominated by hydropower, which makes storage a flexibility tool rather than a decarbonisation subsidy case: there is no dedicated federal battery subsidy — the country’s largest megabattery was built “free of subsidies” by MW Storage — but since 2025 standalone batteries are exempt from grid fees on the energy they draw and feed back, ending the double-charging penalty. A battery stacks revenue from FCR and aFRR balancing plus day-ahead arbitrage, where the 30-day spread averaged €105/MWh — fully 99% of the average price.

€105/MWh

Day-ahead spread — 99% of the average price (30 days)

95%

Low-carbon electricity (hydro-dominated, per lowcarbonpower.org)

2.1GWh

FlexBase underground megabattery planned (800 MW grid connection approved by Swissgrid)